After upgrading Jenkins to the latest version and restarting, there are now 1500+ script approval pending.
Many projects were actually generated from DSL, so the actual number of scripts that we had to approve with the former Jenkins is much less..
We cannot approve all scripts from the script approval item in "Manage Jenkins" since the page crashes due to too many pending approvals and because the too big number of projects...
We are stuck at this point, many of our projects ceased to function.
Many thanks for any hints/fix to help this out.